Great functional 3x magnifier for affordable price - Vortex VMX-3T Magnifier with Flip Mount

I've been running this Vortex-3T Magnifier on my AR for about 2 years. Primary application is 3-gun shooting. The length of the magnifier in conjunction with my Aimpoint PRO Red Dot fills up the available receiver rail. I found in order to obtain and maintain a proper eye relief I had to remove my rear flip-up iron sight to allow the magnifier to be pulled more rearward, closer to my eye.
The push button lock release works smoothly and easily. It locks the magnifier in the usable "Line of Sight" position or thrown to the left in the non-use out of line of sight position. With minimal practice one can quickly and thoughtlessly hit the lock button and tilt the magnifier into and out of your line of sight as needed, while maintaining a good sight picture.
It has a focus ring which once adjusted for your eye requires no further adjustments regardless of viewing range. The magnifier does display a little bit of "slack" in the pivot pin which permits it to present a slight wobble, especially when in the "out of line of sight position". However this is a nit-picking critical observation. This has not had any negative effect on my shooting ability and any "rattle" noise emanating from it hasn't been noticed during 3-gun action while running the gun.
This is a great 3 times magnifier for the price. I have turned not less than 4 other friends on to it and they all love it as well.
Last word. Vortex is an excellent American based company out of Wisconsin. Having used their customer service twice for unrelated assistance I must say I'm very impressed with their customer service, attitude, eagerness to serve me the customer, and finally their unconditional lifetime warranty. They make excellent products and guarantee them for life. No receipts required. Thanks Vortex and Optics Planet - a winning combination!!